Patents by Inventor Robert E. Stonebraker

Robert E. Stonebraker has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4017969
    Abstract: This invention comprises a foldable knife, having replacement blades contained pivotably within a case in one position and extending outwardly therefrom in a second position. Thus the invention is comprised of a case, a rotable blade holder pivotably attached to said case, the blade holder adapted to receive a sharpened blade, a slideable ejector rod positioned in said case, and upon a blade track, adapted to eject the blade from said blade holder when the blade holder is in the outward extended position. This ejection is done by pressing an ejector button attached to said ejector forward with the fingers. A blade lock member is spring biased against the cammed end portion of said blade holder whereby the blade holder is held securely by a cam in its outward extended position.
    Type: Grant
    Filed: April 20, 1976
    Date of Patent: April 19, 1977
    Inventor: Robert E. Stonebraker